Clash on "Horses and Bayonets"

President Barack Obama responded to criticism on military spending from former Massachusetts Gov. Mitt Romney during Monday night's debate with a zinger that quickly reverberated through the Twitterverse and beyond. After Mitt Romney cited the size of the military in 1917 to illustrate what he said was its shrinking under Obama, the president responded that the U.S. does have fewer ships than it did in the early 1900s. "We also have fewer horses and bayonets," he added — a comment that soon went viral.